Commitments and Contingencies (Details) (USD $)	12 Months Ended				1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 30, 2013 Minimum [Member]	Dec. 30, 2013 Maximum [Member]	Feb. 28, 2011 Breach Of Contract [Member]	Dec. 31, 2013 Capital Improvement, Development, And Redevelopment Projects [Member]	Sep. 30, 2023 Mercer Mall [Member] Purchased Call Option [Member]	Sep. 30, 2025 Mercer Mall [Member] Put Option [Member]	Dec. 31, 2013 Congressional Plaza [Member] Put Option [Member]	Dec. 31, 2013 Congressional Plaza [Member] Put Option [Member] Minimum [Member]	Dec. 31, 2013 Congressional Plaza [Member] Put Option [Member] Maximum [Member]	Dec. 31, 2013 Project In Southern California [Member] Put Option [Member]	Dec. 30, 2013 Plaza El Segundo [Member] Put Option [Member]	Dec. 27, 2013 Montrose Crossing [Member] Minimum [Member]	Dec. 27, 2013 Montrose Crossing [Member] Maximum [Member]	Dec. 30, 2013 Obligation To Purchase Member One Ownership Interest [Member] Plaza El Segundo [Member] Put Option [Member]	Dec. 30, 2013 Obligation To Purchase Member Two Ownership Interest [Member] Plaza El Segundo [Member] Put Option [Member]	Jan. 01, 2017 Option To Purchase Preferred Interest [Member] Plaza El Segundo [Member] Maximum [Member]	Dec. 27, 2013 Obligation To Purchase Member Three Ownership Interest [Member] Montrose Crossing [Member] Put Option [Member]	Oct. 16, 2021 Melville Mall [Member] Purchased Call Option [Member]	Oct. 16, 2023 Melville Mall [Member] Put Option [Member]	Dec. 31, 2013 Melville Mall [Member]	Dec. 31, 2012 Melville Mall [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Gross					$ 16,200,000
Product Warranty Accrual	7,400,000	7,100,000
Product Warranty Accrual, Payments	1,200,000	1,300,000
Letters of Credit Outstanding, Amount	15,900,000
Contractual Obligation						246,900,000
Purchase Price Under Option							55,000,000	60,000,000										4,900,000		5,000,000	5,000,000
Mortgage loan face amount																						20,705,000	21,536,000
Option Indexed to Issuer's Equity, Percentage Of Indexed Ownership Interest									100.00%
Option Indexed to Issuer's Equity, Indexed Owenship Interest									29.47%			10.00%				10.00%	11.80%		10.10%
Estimated Maximum Liability Upon Exercise Of Option			11,000,000	13,000,000						68,000,000	75,000,000			7,000,000	8,000,000
Number of Members With Purchase Options													2
Operating partnership units, outstanding	285,722
Operating partnership units outstanding, fair value	29,000,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2014	1,478,000
2015	1,428,000
2016	1,372,000
2017	1,088,000
2018	1,103,000
Thereafter	49,104,000
Total	$ 55,573,000